Leonardo David is a writer and energy consultant who has worked on projects funded by the Inter-American Development Bank. An electromechanical engineer, he has written about solar energy and the ...

The latest price of gold per ounce, gram, and kilogram using real-time interactive gold price charts. View the price of gold for different currencies around the world and various time periods.

Skylight windows typically cost between $383 and $2,390, while labor costs range from $177 to $359 per window. Find a ...

In five states, an average gallon of gas costs less than $3. Drivers have enjoyed a sharp decline in gasoline prices over recent weeks -- and the good times are expected to continue. Gas prices ...